How can a CNS specialize in otology, otoneurology, or neurotology?

Thank you for the link. After searching the organization's site, I found this:

"The National Certifying Board of Otorhinolaryngology and Head-Neck Nurses (NCBOHN) endorses the concept of voluntary, periodic certification by examination for all otorhinolaryngology and head-neck registered nurses. Certification is one part of a process called credentialing. It focuses specifically on the individual and is an indication of current competence in a specialized area of practice. Board certification in otorhinolaryngology and head-neck nursing is highly valued and provides formal recognition of basic otorhinolaryngology and head-neck nursing knowledge.

The Certification Program is sponsored by the National Certifying Board of Otorhinolaryngology and Head-Neck Nurses (NCBOHN). The Certification Examination for Otorhinolaryngology and Head-Neck Nurses is administered for the NCBOHN by the Professional Testing Corporation (PTC), 1350 Broadway - 17th Floor, New York, New York 10018, (212) 356-0660 (212) 356-0660, www.ptcny.com. Questions concerning the examination should be referred to PTC."

I'm still not sure how they get cetified, though...

I'll do that. Thanks.